Exhausted Activities

what do all of you do when you have no energy for anything and all you can manage is crashing on the couch??

I frequently get like this (just now for example, making a tea then I've got an appointment with the couch) - no energy, nothing appeals to break the boredom, if it did I couldn't physically manage it, etc.

I often find myself wasting hours just lying there staring into space, sometimes contemplating, mostly not.